摘要
针对具有局部相关性的试题如何建立自适应考试系统题库的问题进行研究,引入了TRT理论,将具有相关性的试题看作一个整体——"题集"来考虑,并引入与考生能力相关的题集影响参数,该参数解释为与IRT模型中局部独立性假设的偏离.通过仿真实验的方法,比较了具有局部相关性试题建立IRT题库和TRT题库对自适应考试考生能力估计的影响,得出TRT模型更适合具有局部相关性的试题建立题库的结论.根据实验结果对以TRT理论为基础的自适应考试的关键算法进行了研究.
This paper researches the problems of establishing the item pool for CAT of local relative items and introduces the testlet response theory(TRT). TRT views the local relative items as a whole and connects the testlet effect parameter with examinee' s ability. Testlet effect parameter is defined as the deviation from the IRT independence. The simulation result indicates that the IRT model is reasonable for CAT of local relative items in establishing the item pool. Based on the results this paper studies the key algorithm of the CAT system for local relative items.
出处
《南昌工程学院学报》
CAS
2008年第4期24-27,共4页
Journal of Nanchang Institute of Technology